What is Rate: Definition and 1000 Discussions

The Institute for Creation Research (ICR) is a Creationist apologetics institute in Dallas, Texas that specializes in media promotion of pseudoscientific creation science and interpretation of the Genesis creation narrative as a historical event. The ICR adopts the Bible as an inerrant and literal documentary of scientific and historical fact as well as religious and moral truths, and espouses a Young Earth creationist worldview. It rejects evolutionary biology, which it views as a corrupting moral and social influence and threat to religious belief. The ICR was formed by Henry M. Morris in 1972 following an organizational split with the Creation Science Research Center (CSRC).Its work in the field of creation science has been rejected by mainstream science, but has been significant in shaping creationist thought in the United States by introducing creation science through fundamentalist churches and religious schools, and by engaging in public debates against supporters of evolution. The ICR also offers unaccredited graduate level programs in Biblical Apologetics, including a minor in Creation Research. The ICR also operates the ICR Discovery Center for Science & Earth History museum in Dallas, Texas.

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  1. D

    How can I convert a rate of behavioral responses into a probability?

    B.F. Skinner's law of effect said when a response is followed by a reinforcing stimulus, the rate of response increases. So when a response produces a reinforcing stimulus, responses per unit of time (rate) increases. He said the response strengthens. He said when the rate increases, the...
  2. A

    How Does Raising One Wheel Affect Corner Weights in a Car?

    Homework Statement A 3000lb car with a wheelbase of 100 inches and track of 50 inches sits on level ground with equal weight on each wheel. The effective spring rate is 700 lb/in at each wheel. One wheel is now raised by 1 inch and the car is allowed to settle to a new equilibrium. What is the...
  3. T

    Chem Eng rate of heat transfer qts

    Heat Transfer Qts Engine oil at 60 oC flows over flat plate whose temperature is at 20 oC with a velocity of 2 m s-1. The length of the plate is 5m. What is the film temperature and the rate of heat transfer per unit width of the entire plate? Additional information (at the film temperature)...
  4. N

    Chemistry Chemical Process Analysis - Mole Flow Rate

    Homework Statement 120 mol/min of Propane (C3H8) is burned in the presence of air (21% O2 and 79% N2) in a furnace, two reactions occur: Complete Combustion: 67%, propane is burned to CO2 and H2O Incomplete Combustion: 18%, propane is burned to CO and H2O Oxygen is supplied at 70%...
  5. E

    Use chain rule to find rate of area increase

    Homework Statement 32) A stone dropped into a pond at time t=0 seconds causes a circular ripple that ravels out from the point of impact at 5 metres per second. At what rate (in square metres per second) is the area within the circle increasing when t=10? Homework Equations I need to use...
  6. 9

    Finance math: find total interest rate

    Homework Statement I am given this question: what is the monthly payment necessary to ammortize a loan of $100 000 at 2.3% compounded monthly for 20 years. I know the answer to the above: it is done by using the ammortization payment formula, in this case: R = 100 000...
  7. A

    Photon Arrival Rate: Doppler Effect Explained

    Let a monochromatic plane wave impinge on a collector of area A, delivering power P. Let the average photon rate of arrival on the collector be B. Now make the collector move toward the source at velocity v. By the Doppler effect, the frequency, and hence the energy, of the photons will...
  8. N

    Latest high frame rate consumer priced video cameras?

    I'd like to get images at a frequency of at least 100 frames/sec to measure servo arm speeds (including acceleration from rest) under various torque loads. This is for personal research associated with RC helicopter accessories, but as a high school physics teacher it seems it would be good for...
  9. N

    Does the spring constant of rubber affect the rate at which it cools?

    Does the spring constant of a piece of rubber affect its rate of cooling constant 'k' ? 1) Is there any formula, any proven relationship? 2) If there isn't, would investigating it make any sense? Or would it end up being a waste of time as the two variables are totally unrelated? Is there...
  10. R

    Rate of change of angular acceleration?

    I am calculating the time it takes for an object to fall 90° about an axis of rotation in the x-y plane. I have managed to calculate the rate of change of angular acceleration, which will be represented by the symbol ψ. Unfortunately it is not rad/s^3, but (rad/s^2)/θ or \alpha/θ. The value of ψ...
  11. C

    Thermo, heat transfer rate, power plant

    Homework Statement A power plant generates 1300MW and operates at 315 °C a 20°C heat sink is available. what is the minimum rate at which heat must be discarded? Homework Equations not really sure how to begin this one, have a feeling it is related to dq=Tds at constant pressure giving...
  12. J

    Rate of evaporation and steam tables

    Looking at the steam table below, if I understand things correctly, it will take 419kJ to bring a kg of water to the boil at 100°C and a further 2257kJ to turn all of that boiling water into steam. I assume that would have to be in an open boiler, as the pressure inside of a closed vessel would...
  13. Square1

    Concept of Rate: Understanding Division of Different Units

    The concept of a "rate" Here's another question from good ol square :| I was hoping to get some clarification about the concept of a rate of two quantities, with different units, like speed \frac{a-units}{b-units}. How does the expression for division \frac{a-units}{b-units} arise from the...
  14. A

    Why do gradient show rate of maximum increase ?

    Why do gradient show rate of maximum increase not decrease always?
  15. M

    Finding direction where the rate of change is fastest

    Homework Statement surface of mountain is modeled by h(x,y)=5000-0.001x^2-.004y^2. Climber is at (500,300,4390) and he drops bottle which is at (300,450,4100) What is his elevation rate of change if he heads for the bottle? In what direction should he proceed to reach z=4100 feet the...
  16. J

    Water Tank Volume Rate of Change at Specific Depth

    Homework Statement Water runs into a cylindrical tank at the rate of 0.6m^3/s. The tank has a heigh of 2.5m and a base radius of 1.2m. How fast is the water level rising when the water level is 1.6m deep. Homework Equations V=∏ x r^2 x h The Attempt at a Solution I know that...
  17. M

    The rate of thermal energy transfer

    Task: A steady flow boiler takes in feed water at 1.5kg/s, at a temperature of 30 °C. The water is heated and turned into wet steam. This leaves at 1.5kg/s, with a pressure of 10 bar and a dryness fraction of 0.97 to the superheater, where it receives heat at a constant pressure and emerges...
  18. L

    Geiger Muller Tube time constant to correct for count rate loss.

    Hello All, I am playing with some questions in an old textbook I have been reading through and I am getting confused on this question regarding GM Tubes.The question that is stumping me goes like this: If a certain GM Tube has a time constant of 80msecs and procedures require that...
  19. M

    Find units of rate constants and write reactions

    Homework Statement Find the units of k1, k2, k3, k4, and k5. Write rate reactions for dA/dt a. A\leftrightarrowB k1 (forward) k2 (backward) b. A + B \rightarrow C k3 (forward) c. A + R \rightarrow 2R k4 (forward) d. A \rightarrow B k5 (forward) Homework Equations...
  20. D

    Evacuated Canister and Flow Rate

    Hello everyone, I am currently in a mechanical engineering program, and I am on my first co-op work term. I have been assigned to make modifications to a PVC collection device involving flow rates, but I have not yet taken any courses relative to flow. I was hoping I could get some help and some...
  21. R

    Rocket thrust, mass, speed given initial m and fuel consumption rate?

    A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 59.5E5 kg, of which 7.39E5 kg is fuel. The rocket engine is then fired for 300 s, during which fuel is consumed at the rate of 480 kg/s. The speed of the exhaust products relative to the...
  22. A

    Flow rate distribution on multiple branch

    Let say I have a simple fan/duct system delivering air at standard conditions with one branch at inlet and one branch at discharge. The fan is operating in its stable region with known flow rate and system pressure. Now if I add a branch on the inlet side (not necessarily at the fan) to...
  23. F

    Batteries: capacity, charging and discharing rate meaning

    Hello Forum, Battery chargers are devices to put energy into a secondary (rechargable) bttery by forcing an electric current through it. The charge current depends on the technology and capacity of the battery being charged. The capacity of a battery represent the amount of electric charge...
  24. A

    Kinetic Energy in water and the rate carried across each square meter

    [b]1. Consider an ocean current flowing at 2.5m/s a) How much kinetic energy is contained in a cubic volume of water that measures 1m on each side? The density of seawater is about 1030kg/m3 b) If the flow is perpendicular to one of the cube faces, what is the rate at which the current carries...
  25. J

    Measuring mass flow rate into engine

    I have a motorcycle engine on a test stand and I need a way to measure the mass flow rate into the engine. It is currently carburated. I had two ideas off the top of my head. 1) build a venturi, and measure the pressure drop to figure out the velocity and therefore the mass flow rate...
  26. C

    Water flow rate equation. HELP

    Hi, Me and 4 others are stumped on our HNC Electrical Project. We need an equation that calculates from the flow rate of water and diameter of a pipe, what amount of electrical power outage can be gotten by using a simple turbine connected to the pipe. Any sort of help would be greatly...
  27. S

    Rate of thermal conduction in various copper structures

    A cylinder is constructed from a super insulator. The dimensions of the cylinder are Length L: 1 M; inside diameter i.d.: 12 mm. The entire Length of the cylinder contains copper (cases described below). Heat (T > 100C) is continuously applied to the copper on one end of the cylinder...
  28. Y

    Pressure regulator affect flow rate through pipe?

    Good day to all, was wondering how a pressure regulator doownstream will affect the flow rate of compressed air through a pipe. Anyone has any insights on this? the pressure regulator is to reduce the downstream pressure but I'm really confused how the flow will be affected. For instance, will...
  29. S

    How to find this rate of change?

    Homework Statement Given f(x, y, z) = 3x + 2y + 4z, find its rate of change at (1, 2, 3) on the plane y = 2. Homework Equations The Attempt at a Solution Since y is constant, I don't know if I have to find ∂f/∂x or ∂f/∂z. It's a homework problem, but I don't know if it was bad written by the...
  30. N

    Calculating Volumetric Flow Rate (Q) of Non-Water Liquids

    Hey, I was wondering how to calculate the volumetric flow rate (Q) of a liquid other than water through a hole at the bottom of a tank. I know that Q= V.A and 1/2.ρ.V^2 = ρ.g.h Where, V: Velocity of the liquid coming out of the hole A: Area of the hole h: Height of the...
  31. J

    How altitude effects gas flow rate or not?

    I am considering the effects on volumetric and mass flow rate for two conditions: Condition 1) 1013mBar, 21C (Air density as per) Condition 2) 700mBar (10,000ft) 21C (Air density as per) Setup: A variable flow restrictor is connected to a constant source of oxygen at 50 psig. The variable...
  32. A

    Volumetric flow rate of air into a tank - Fluid Mechanics

    Hi all, I am stuck on a problem, and it's been a while since I took fluid dynamics. I have a cylindrical tank of know capacity with an inlet, where a vent is attached, and an outlet, the fluid gets sucked. The tank has fluid in there with known volume and density. If I know the usage rate of...
  33. W

    Calculating Air Consumption Rate for SKG200 Valves

    Hi all I am trying to set up a report showing the air consumption rate of my cylinder actuators on different valves. I am stuck at the very end where I should calculate the air consumption rate. All calcs are in metric units. Okay as an example let's use the following: Valve: SKG200 with...
  34. G

    What is the maximum rate of angle change for a function?

    So I have been thinking of this problem... what is the greatest rate of angle change for a function? As in, what is the point in which a function achieves its greatest rate of angle change... Well, the angle of a function can be determined by arctan(y') The Rate of Angle change is...
  35. MarkFL

    MHB Neonblast342's question at Yahoo Answers regarding finding a rate of change

    Here is the question: Here is a link to the question: Calculus problem! Please help!? - Yahoo! Answers I have posted a link there to this topic so the OP can find my response.
  36. S

    Error Rate and Its Role in Significance

    I am trying to understand the relationship between p-values and Type II error rate. Type II error occurs when there is failure to reject the null when it is false. As an example, suppose that I find that my results are not significant. In this case, the p-value is increased, or higher (in...
  37. W

    Air Consumption Rate of Cylinder Actuators on SKG200 Valves

    Hi all I am trying to set up a report showing the air consumption rate of my cylinder actuators on different valves. I am stuck at the very end where I should calculate the air consumption rate. All calcs are in metric units. Okay as an example let's use the following: Valve: SKG200 with...
  38. deep838

    Rate of change of angular velocity

    Let a particle of mass m be rotating in a circle, radius be r, axis of rotation through the center and perpendicular to the plane of motion. Now if the radius is made decrease somehow at some rate until it get's zero, how do I find the rate of change in angular velocity? Also, the angular...
  39. S

    Problem about rate of change (multivariable calculus)

    Homework Statement Let T = f(x, y, z), where dx/dt = 4, dy/dt = 4 and dz/dt = -3 Calculate dT/dt if dT/dx = 4, dT/dy = 7 and dT/dz = 9 Homework Equations dT/dt = ∂T/∂x (dx/dt) + ∂T/∂y (dy/dt) + ∂T/∂z (dz/dt) The Attempt at a Solution I tried to get an explicit formula for T. I...
  40. Y

    Decay rate and lifetime of Z Boson

    What are the accepted numbers for the decay rate and lifetime of Z-> mu+mu- and Z-> e+e- decays? also what is the unit for the decay rate? thank you!
  41. A

    Effect of Pressure on the Initial Rate

    Hi, Let's suppose an elementary reaction of the low-pressure mixture has the initial reaction rate of x (2A + B --> A2B). What would be the initial reaction rate of the high-pressure mixture? (Imagine a mass M is placed upon the beaker filled with the mixture, and a mass 3M is placed upon...
  42. D

    Max Rotation Rate of a Slowing Turntable

    Homework Statement A turntable of radius "r" is spinning counterclockwise at an initial rate of ω. at t=0, its rotation rate begins to slow at a steady pace. the rotation finally stops at t=T. At what time is ωt^2 maximum. Express your answer in terms of T.
  43. N

    Speed and rate of data transfer

    suppose i want to transfer digital signals over 100 meter wire, the loic is implemented using two level, a +5 volts for 1 and 0 volts for logic 0. I want to transfer the data with speed 1000 Mbps which is 10^9 bits per second. now i consider the worst case scenario that my data consist of...
  44. B

    Does the Universe have a Frame Rate ?

    Does the Universe have a "Frame Rate"? Surely, thinking about it, things can't just smoothly transpose from one location to another, there must be regular gaps, (far to quickly for us to notice) where it "jumps" from one point in space to another. I think this because it seems hard to imagine...
  45. W

    Relationship between Flow Rate and Distance of Water Droplet Travel in Air

    Hi, I'm designing a system that spray water into air. I'm wondering how I should go finding out the relationship between the flow rate and distance of travel of the water droplet in air. If I am spraying the water going the same direction as the wind, how much would the velocity of the...
  46. U

    How Fast Does Water Cool in a Polystyrene Box?

    Homework Statement A cubic polystyrene box contains a litre of water at 90°C. It is 10cm wide and has a wall thickness of of 5mm. Room temperature is 25°C and the conductivity of polystyrene is 0.033W/m°C. What is the rate of temperature drop of the water? Homework Equations P=...
  47. N

    Find the Mass Flow Rate Through the Nozzle

    Homework Statement Helium gas flows through a well-insulated nozzle at steady state. The temperature and the velocity at the inlet are 550°R and 150 ft/s, respectively. At the exit, the temperature is 400°R and the pressure is 40 lbf/in2. The area of the exit is 0.0085 ft2. Using the ideal gas...
  48. P

    Simple rate of change problem?

    Homework Statement The Function S(t) = 6t(t+1) describes the distance (in kilometers) that a car has traveled after a time t ( in hours), t E [0,6] Find the average velocity of the car from t= 2 to t= 2 + ∆t Homework Equations y'= f(x+h) - f(x) ------------ h...
  49. M

    Why is rate of change related to the area under a function

    I don't understand why integrals and derivatives work, and i don't understand why theyre so closely related. Let's take a function y= x^2 + 2x + 9 y' = 2x + 2 Why do the rules for taking derivatives work? Why does reducing the power of a term by 1 and adding that as a coefficient work...
  50. A

    How to calculate thermal exchange rate of Air?

    How would I calculate thermal exchange rate of Air for different amounts of humidity? I'd like to create a graph to show how much radiant heat air would absorb, (at some temperature (10°C) changes depending on the humidity amount, 0 - 100%
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